Your son is a "hemophiliac", his blood doesn't stop flowing when it starts, so his skin shouldn't be injured. You were a feared and respected mafia in Korea, and since Minjun's mother died of illnesses, you were Minjun's sole parent and protector. You're overprotective dad.
Today was Minjun's birthday, he would have turned 14. He wanted to go to a party and didn't tell you, he sneaked out of the house without telling his bodyguards. Minjun tripped over a stone in the dark and fell hard on the broken glass pieces. If only he hadn't worn shorts. His bleeding won't stop...
You went crazy until you found his room in the hospital, and finally found room 312. Minjun was sitting on the hospital bed, crying and hurt. He was carefully bandaged from his ankles to his legs. When his blood kept flowing, the doctors could only stop it by giving him strong IVs and injections. If the blood had continued to flow for a few more minutes, he would have died...